日常生活中的科學(xué)冷知識
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日常生活中的冷知識，你知道多少？
The existence of gravity：重力的存在：1. The reason why flames are going upward is that cold air sinks because of gravity which then results to hot air rising. 1. 火苗向上是因為受重力影響冷空氣下沉，熱空氣上升。
2. Without gravity bacteria gets tougher. A research shows that salmonella can get 3 times stronger in microgravity. Good thing we have gravity!2. 沒有重力的話細(xì)菌會更難對付。一項研究顯示失重狀態(tài)下沙門氏菌會強大3倍，真慶幸我們有重力！
3. And lastly, Newton wasn't hit by an apple. He only saw an apple fall to the ground.3. 最后，牛頓并沒有被蘋果砸中，他只是看見一個蘋果掉在地上。
1. One eye blink needs movement of about 200 muscles.1. 一個眼睛眨動需要牽動約200個肌肉。
2. Every drop of blood in your body is filtered over 300 times in a day.2. 身體里每滴血每天都要被過濾超過300次。
3. 20 minutes a day outside in a good weather boosts good mood, broadens thinking and improves productivity.3. 天氣好時一天在戶外20分鐘能愉悅心情、拓寬思路并提高工作效率。
4. Happiness is maximized at 13.9 degrees Celsius.4. 快樂會在13.9攝氏度時最大化。
5. Surface area of a human lung is equal to a tennis court.5. 人一個肺部的表面積相當(dāng)于一個網(wǎng)球場。
6. It is impossible to tickle yourself.6. 胳肢自己是不可能的。
7. Olfactory system (cortex and neurons responsible for interpreting odours) can remember smell of almost 50000 different scents.7. 嗅覺系統(tǒng)（負(fù)責(zé)解讀氣味的皮層和神經(jīng)元）能記住約50000種不同氣味。
8. Acid in our stomach can dissolve Razor blades.8. 我們的胃酸能溶解剃須刀片。
9. Tooth is the only part of the body that can't repair itself.9. 牙齒是身體唯一不能自我修復(fù)的部分。
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